Hhhmmm, I have seen enough Idra complaining already.
If you scout an Engineering Bay, that could mean that a Planetary Fortress Rush is coming. When it comes, put your workers into two control groups. Of course you'll need your main building on a control group too for easy production of workers, and set the rally point to a mineral node. One worker control group will move under the Command Center and prevent it from landing. They will also try to escape being surrounded by SCV's, while trying to surround an SCV to attack it if the placements are right, while making sure the Command Center doesn't land though. Opponent will have brought his SCV's so I like using more than one worker in this control group to be able to do some attacks if possible with that group.
The second group will keep getting money, while escaping being surrounded by SCV's, but surrounding and attacking one if they get in the wrong spot. Keep making workers, and if you are able to you can get your army going. Try not to let the SCV's mine any minerals. Don't let them go into the Command Center and escape either, if it lands, they can fly to an island and the game will continue. If the Command Center lands in your base, you can save up $400 and build a base somewhere else at a different starting location. If their SCV's are in the wrong spot and you can micro well you can try to attack them. Don't build any buildings near where the Command Center is trying to land. If it lands and transforms then you will lose those buildings.
As far as getting up a highly defended high ground choke point ramp into a Terran base, there are various methods, some better than others. Upgraded Colossi can take out a lot of it from a distance, and Immortals are also pretty good against this too. Make sure you get an Observer or two to get sight on the high ground.
You can also try using a Warp Prism to make a drop in their resource area and attack their workers. You may be also able to attack their ramp at this point if they split their forces weak enough, but be very careful. Phoenix can also fly in and keep lifting/hitting workers and then escaping, although this will only work for a little bit since they'll get marines and turrets there. The special abilities of Stalkers and Sentries can help a little bit in the main attack at the ramp, with Zealots, too, but you need to be careful and have a big force. An Archon can have enough shields to get up the ramp, assuming their are not Ghosts, you have to be very careful with that too. You should also consider trying to contain them in their base while you expand.
Primarily I like: attacking with Colossi and Immortals and Observers, attacking their workers, and containing them while you expand, to handle a heavily defended Terran uphill choke point ramp.
Siege Tanks, Reapers, Zealots, Ultralisks, and Battlecruisers will lose power in patch 1.1 that's coming out. Crota says he's concerned how the Siege Tank change will change TvZ games though.
Do any of you play on Debris Field map? I like that map. What map do you like?
HD Starcraft 2 TT1 v MasterAsia p1/4
http://www.youtube.com/watch?v=qEV9niTmeOU
Interesting replay. Good luck, Yojimgari